Medical-Grade HFC-23 Calibration Gas from Japan
High-purity trifluoromethane (HFC-23) diluted in balance gas for calibrating medical gas analyzers and environmental monitoring equipment. Falls under HTS 2903.41.10.00 as a chemically defined organic compound per Chapter 29 note 1(a), with dilution allowed under note 1(d) if for safety/transport.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide NIST-traceable certificates of analysis showing HFC-23 concentration (typically 10-50 ppm) and balance gas composition
• Comply with FDA 21 CFR 201.161 for medical device calibration gases if end-use requires it